How to measure your ring size at home
By the Tapepal teamUpdated 3 min read
Quick answer
Measure the inside diameter of a ring that fits and look it up. A US 6 is 16.5 mm across, a US 7 17.3 mm, a US 8 18.1 mm.
On this page2 sections
With a ring you own
- Pick a ring that fitsSame finger, same hand if you can.
- Measure across the insideEdge to edge through the center, in millimeters.
- Look it upFind the diameter in the table below.
| US | UK | EU | Inside diameter |
|---|---|---|---|
| 5 | J½ | 49 | 15.7 mm |
| 6 | L½ | 52 | 16.5 mm |
| 7 | N½ | 54 | 17.3 mm |
| 8 | P½ | 57 | 18.1 mm |
| 9 | R½ | 60 | 18.9 mm |
| 10 | T½ | 62 | 19.8 mm |
With string or paper
Wrap a strip of paper around the base of your finger, mark where it meets, and measure the length in millimeters, the unit ring charts use. Divide by 3.14 to get the diameter.
Free toolRing sizerPut a ring on your screen and read its size: US, UK and EU.
Measure small things on screen.Tapepal has a ruler built in, for rings, screws and coins.Get TapepalQuestions
What if my knuckle is bigger?
Choose the size that slides over the knuckle. A slightly loose ring at the base is normal.
I am between sizes. Which one?
Go up half a size, especially for wide bands.
Does band width matter?
Yes. Bands wider than about ¼ in feel tighter, so go up half a size.
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